Plasma nitriding behavior of Ti6Al4V orthopedic alloy

Yildiz, F.; Yetim, A.F.; Alsaran, Akgün; Çelik, A.

doi:10.1016/j.surfcoat.2007.08.004

Cited by 120 publications

(96 citation statements)

References 15 publications

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“…A signicant increase up to 660 HV 0.01 in the surface hardness of plasma nitrided Ti6Al4V alloy was observed when compared with about 270 HV 0.1 in as-received material. The nitrogen atoms improve the hardness of the surface as a result of solid solution hardening in the diusion layer because of causing enlargement of α-Ti structure after the nitriding diusion ability and depth of nitrogen atoms increase depending on the process time as expected for diusion controlled growth [8]. The hardness values decrease from Fig.…”

Section: Resultsmentioning

confidence: 91%

The Effect of Low Temperature Plasma Nitriding on Wear Resistance of Ti6Al4V Alloy

2014

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The eect of low temperature plasma nitriding on wear resistance of Ti6Al4V alloy were investigated. There have been several studies to investigate the low temperature plasma nitriding on Ti6Al4V alloy. Plasma nitriding processes under gas mixture of N2/H2 = 3 were performed at temperature 535• C for duration of 4, 8 and 12 h. Adhesive wear tests were carried out by using a tribometer in block-on-ring conguration (ASTM G77), in sliding conditions, without lubricants and in air. Surface hardness of the plasma nitrided samples were measured by a Vickers hardness tester machine. Scanning electron microscopy studies were conducted to understand the wear mechanisms involved during the adhesive wear. Wear rate was calculated using weight loss per unit sliding distance. It was found that the wear resistance and surface hardness of the alloy improved considerably after plasma nitriding process. The wear resistance of the plasma nitrided samples were higher than of the unnitrided samples. Extension of nitriding times from 4 h to 12 h in the Ti6Al4V alloy improved remerkably the wear resistance and surface hardness.

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Section: Resultsmentioning

confidence: 91%

The Effect of Low Temperature Plasma Nitriding on Wear Resistance of Ti6Al4V Alloy

2014

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“…However, titanium and its alloys have a high friction coefficient and low hardness, which make their tribological properties very poor and limit their engineering applications [7][8][9]. To improve the tribological properties of titanium and its alloys, some technologies such as ion implantation, physical-vapor deposition, chemical-vapor deposition, carburizing, nitriding, laser cladding, and oxidation have been studied [10][11][12][13][14][15][16][17][18]. Among these methods, laser cladding has been used to prepare the advanced coatings so as to protect the engineering components against friction, due to the fact that the high energy density of the laser beam and the coatings prepared by laser cladding are very dense and have strong metallurgical bonding to substrates [19].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Oxidation and Wear Resistance of Pure Ti by Laser-Cladding Ti3Al Coating at Elevated Temperature

et al. 2011

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Ti 3 Al coating was in situ synthesized successfully on pure Ti substrate by laser-cladding technology using aluminum powder as the precursor. The composition and microstructure of the prepared coating were analyzed by transmission electron microscopy, scanning electron microscopy (SEM), and X-ray diffraction technique. Thermal gravimetric analysis was used to evaluate the high-temperature oxidation resistance of the Ti 3 Al coating. The friction and wear behavior was tested through sliding against Si 3 N 4 ball at elevated temperature of 20, 100, 300, and 500°C. The morphologies of the worn surfaces and wear debris were also analyzed by SEM and threedimensional non-contact surface mapping. The results show that the Ti 3 Al coating with high microhardness, hightemperature oxidation resistance, and high temperature wear resistance. The pure Ti substrate is dominated by severe adhesion wear, abrasive wear, fracture, and severe plastic deformation at lower temperature, and severe adhesion wear, abrasive wear, plastic deformation, oxidation, and nitriding wear at higher temperature, whereas the Ti 3 Al coating experiences only moderate abrasive and adhesive wear when sliding against the Si 3 N 4 ceramic ball counterpart. In addition, the wear debris of the laser-cladding Ti 3 Al coating sliding and Si 3 N 4 friction pairs are much smaller than that of pure Ti substrate and Si 3 N 4 friction pairs at elevated temperature.

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“…However, Ti and Ti-alloys have poor tribological properties, such as a high friction coefficient and low hardness, which greatly limit their engineering applications [7][8][9]. Various surface modification technologies, such as laser cladding, ion implantation, physical vapor deposition (PVD), chemical vapor deposition (CVD), carburizing, nitriding, and oxidation, among others, have been studied [10][11][12], including high-energy density laser cladding, which has been used extensively to prepare the protective coatings for engineering components [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Tribological Properties of a HfB2-Containing Ni-Based Composite Coating Produced on a Pure Ti Substrate by Laser Cladding

et al. 2011

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A HfB 2 -containing Ni-based composite coating was fabricated on Ti substrates by laser cladding, and its microstructure and tribological properties were evaluated during sliding against an AISI-52100 steel ball at different normal loads and sliding speeds. The morphologies of the worn surfaces were analyzed by scanning electron microscopy (SEM) and three-dimensional non-contact surface mapping. The results show that wear resistance of the pure Ti substrate and NiCrBSi coating greatly increased after laser cladding of the HfB 2 -containing composite coating due to the formation of hard phases in the composite coating. The pure Ti substrate sliding against the AISI-52100 counterpart ball at room temperature displayed predominantly adhesive wear, abrasive wear, and severe plastic deformation, while the HfB 2 -containing composite coating showed only mild abrasive wear and adhesive wear under the same conditions.

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Plasma nitriding behavior of Ti6Al4V orthopedic alloy

Cited by 120 publications

References 15 publications

The Effect of Low Temperature Plasma Nitriding on Wear Resistance of Ti6Al4V Alloy

The Effect of Low Temperature Plasma Nitriding on Wear Resistance of Ti6Al4V Alloy

Improvement of the Oxidation and Wear Resistance of Pure Ti by Laser-Cladding Ti3Al Coating at Elevated Temperature

Microstructure and Tribological Properties of a HfB2-Containing Ni-Based Composite Coating Produced on a Pure Ti Substrate by Laser Cladding

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